Sewing-machine shuttle



March 18,1924; 1,487,066

H. G. JOHNSCN SEWING MACHINE SHUTTLE Filed June 21 1922 Patented Mar. 18, 192%.

HENRY G. JOHNSON, OF EAST HAMPTON, CONNECTICUT, ASSIGNOR TO SUMIVIIT THREAD COMPANY, OF EAST HAMPTON, CONNECTICUT, A. CORPORATION OF MAINE.

SEWING-MACHINE SHUTTLE.

Application filed June 21, 1922. SerialgNo. 569,888.

To all whom it may concern:

Be it known that I, HENRY G. JOHNSON, a citizen of the United States, residing at East Hampton, in the county of Middlesex and State of Connecticut, have invented new and useful Improvements in Sewing-Machine Shuttles, of which the following is a specification.

This invention relates to a rotary shuttle comprising a body member, having the usual beak and a head member hinged to, the body member, and adapted to be removably seated on the latter, said members being provided with openings which coincide and form a bobbin chan'iber when the head member is seated, means being provided, including a hinge ear on the head member and a spring tongue fixed to the body member, for yieldingly confining the head member seated.

In a shuttle of this type, the spring tongue extends across one end of the bobbin chamber, and the shuttle includes a post adapted to engage the core of aready wound bobbin, the post being provided with a disk bearing on an annular flange .on the head member, and with means cooperating with said tongue in forming a bearing permitting the rotation of the post and a bobbin thereon, and inpressing the disk against said flange to prevent an undesirably loose and free rotation of the post and bobbin.

The invention is embodied in certain improvements hereinafter described and claimed in the post and in the means 00- operating with the spring tongue, for the purposes stated, the object being to provide a simple and durable embodiment of said means, adapted to permit thread to be drawn freely across the axis of the post when the thread in unwinding from the bobbin, con tacts with the tongue, and has to be drawn across said axis to the tension devices of the shuttle.

Of the accompanying drawings forming a part of this specification Figure 1 is a plan view of a shuttle of the type to which my invention relates.

Figure 2 is a section on line 22 of Figure 1.

Figure 3 is a plan view, and Figure ,4 an edge or side view of the post and disk.

Figure 5 is a sectional view showing the post before attachment to the disk.

' The figures are drawn on a considerably enlarged scale.

In the drawings, 12 represents the member of a shuttle employed in certain types of the Singer sewing machine, and provided with a beak 13, a hinge pintle 14:, and a circular opening 15. 16 represents the head member having a hinge ear 17 engaged with the pintle 14, and a circular opening 18 arranged as shown by Figure 2, to coincide with the opening 15, the two openings forming a bobbin chamber. 19' represents a spring tongue attached at one end, as by a rivet 20 to the member 12, extending across one end i of the bobbin chamber and bearing yieldingly at its free end on a flat face formed on the ear 17 to hold the head section yieldinglyseated on the body section, the head section being displaceable as indicated by dotted lines in Figure 2. The head section is provided with an annular inwardly projecting flange 21 constituting a friction member cooperating with. a friction disk 22 ona bobbin-engaging post 23. V

The construction thus far described is well known, the post being provided with yielding pressure means cooperating with the tongue 19 in forming a bearing for one end of the post, and in pressing the disk 22 yieldingly against the flange 21, to prevent a too loose and free rotation of the post and of a bobbin engaged therewith.

body

In carrying out my invention, I construct V The post 23 is closed at one end and has a rivet forming extension 25 at its closed end, and an annular shoulder 26 surrounding said extension. The extension 25 is inserted in a central orifice in the disk 22 and is then upset to form a burr or flange confining the disk on the shoulder. The post is provided with a core 27, which is closed at the closed end of the post, and open at the opposite end. When the postis completed, the open end of the bore is slightly contracted to form an annular stop at 28.. Before the bore is contracted, I insert therein a spring 29 and a polished steel ball 80, the ball having a loose fit in the bore, so that it is adaptedto rotate therein. After the insertion of the spring and the ball, I

slightly upset inwardly the open end of the inner end of the bore.

post, thus contracting the open end of the bore at 28, sutllciently to prevent the removal of the ball from the post, Without preventing free movement or the ball toward the The arrangement is such that a portion or" the ball normally projects from the post and is held by the spring against the tongue 19 when the head member is seated in the body member, the spring being thus com )l'GSSGCl and acting to press the disl 22 against the flange 21.

The closed end or": the oost enables a solid rivet extension 25 to be ormed on the post, and constitutes an abutment "for the spring 29. The bore contracted at its open end enables a ball to be inseparably confined in the post in such manner that the ball is in rolling contact with the tongue 19, and not only constitutes a yielding end thrust bearing for one end of the post, but also enables thread which may contact with the tongue in passing from the bobbin to the usual tension devices with which the shuttle is provided, to be readily drawn across the axis of the post, the ball turning freely in the post when the thread is drawn between the projecting portion of the ball and the tongue 19.

The bobbin here shown is of the ready Wound variety, and is composed of a Wind- 82 of thread on a cop tube 33, in Which the post is insertible. the post being preterably o1 polygonal form, as shown by Figures 3 and 4, so that it has obtuse angles adapted to slightly indent the tube.

1: do not limit myself to the general shuttle construction shown and described, and

may employ the improvements characterizing the invention in connection With a shuttle having suitable frictional element substituted for the flange 21, and cooperating with the disk 22, and any suitable pressure-supporting element substituted for the tongue 19 and adapted to cooperate with the ball 30.

1 claim:

1. A shuttle having a bobbin chamber, a

nuances frictional element at one end of the chamber, a pressure-supporting element at the opposite end of the chamber, a bobbin engaging post having a bore closed at one end and open at the opposite end, said open end being contracted, a disk fixed to the closed end of the post and bearing on said frictional element a spring Within the post seated on the closed end thereof, and a ball yieldingly held by said spring against the contracted of the bore, portion of the ball normally projecting from the post and being adapted to roll on said supporting element.

2. A sewing machine shuttle comprising a body member, a head member hinged and adapted to be seated on the body member, said members: being provided with circular openings forming a bobbin chamber When the head member is seated, the head member having an annular flange extending around the bobbin chamber, a spring tongue fixed at one end to the body member extending across said chamber and having its free end engaging the head member to hold said head member yieldingly seated, a bobbin core-engaging post closed at one end and having a rivetd'orming extension at its closed end and an annular shoulder surrounding said extension, a disk united to the post by said extension and adapted to frictionally engage the flange of the head member, the post having bore opening through the end of the post opposite the disk and contracted at its open end, a spring seated signature.

HENRY G. JOHNSON, 

